Crawford, R.M., author
Hutchinson's University Library, 1955
Buku Teks
Crawford, R.M., author
Hutchinson University Library, 1952.
Buku Teks
Berney, Maurice, author
Angus and Robertson, 1965
Buku Teks
Spate, Oskar Hermann Kristian, author
Ernest Benn, 1968
Buku Teks
Princeton University Press, 1944
Buku Teks